Shamusworld >> Repos - apple2/blob - src/gui/textedit.cpp

   1 //
   2 // TEXTEDIT.CPP
   3 //
   4 // Graphical User Interface button class
   5 // by James L. Hammons
   6 //
   7 // JLH = James L. Hammons <jlhamm@acm.org>
   8 //
   9 // WHO  WHEN        WHAT
  10 // ---  ----------  ------------------------------------------------------------
  11 // JLH  02/17/2006  Created this file
  12 // JLH  03/01/2006  Added basic editing functionality
  13 //
  14
  15 #include "textedit.h"
  16 #include "guimisc.h"                                                            // Various support functions
  17
  18 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
  19 #define MASK_R 0xFF000000
  20 #define MASK_G 0x00FF0000
  21 #define MASK_B 0x0000FF00
  22 #define MASK_A 0x000000FF
  23 #else
  24 #define MASK_R 0x000000FF
  25 #define MASK_G 0x0000FF00
  26 #define MASK_B 0x00FF0000
  27 #define MASK_A 0xFF000000
  28 #endif
  29
  30 //
  31 // Text edit class implementation
  32 //
  33
  34 TextEdit::TextEdit(uint32_t x/*= 0*/, uint32_t y/*= 0*/, uint32_t w/*= 0*/, uint32_t h/*= 0*/,
  35         std::string s/*= ""*/, Element * parent/*= NULL*/):
  36         Element(x, y, w, h, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x40, 0x40, 0xFF, parent),
  37         activated(false), clicked(false), inside(false),
  38         img(NULL), text(s), caretPos(0), scrollPos(0),
  39         activatedSave(false), clickedSave(false), insideSave(false),
  40         caretPosSave(0), scrollPosSave(0)
  41 {
  42         if (extents.h == 0)
  43                 extents.h = GetFontHeight();
  44
  45         // Setup hardwired colors...
  46
  47         uint8_t * c = (uint8_t *)&hiliteColor;
  48         c[0] = 0xFF, c[1] = 0x80, c[2] = 0x00, c[3] = 0xFF;
  49         c = (uint8_t *)&cursorColor;
  50         c[0] = 0x40, c[1] = 0xFF, c[2] = 0x60, c[3] = 0xFF;
  51
  52         // Create the text edit surface here...
  53
  54         img = SDL_CreateRGBSurface(SDL_SWSURFACE, extents.w, extents.h, 32,
  55                 MASK_R, MASK_G, MASK_B, MASK_A);
  56
  57         Draw(); // Can we do this in the constructor??? Mebbe.
  58 }
  59
  60 TextEdit::~TextEdit()
  61 {
  62         if (img)
  63                 SDL_FreeSurface(img);
  64 }
  65
  66 //Set different filters depending on type passed in on construction, e.g., filename, amount, etc...?
  67 void TextEdit::HandleKey(SDL_Scancode key)
  68 {
  69         if (!activated)
  70                 return;
  71
  72 // Punting this for now on SDL 2...
  73 #if 0
  74         SaveStateVariables();
  75         SDLMod keyMod = SDL_GetModState();
  76
  77         if ((key >= SDLK_a && key <= SDLK_z) || (key >= SDLK_0 && key <= SDLK_9)
  78                 || key == SDLK_PERIOD || key == SDLK_SLASH || key == SDLK_SPACE)
  79         {
  80                 uint8_t chr = (uint8_t)key;
  81
  82                 // Handle shift key as well...
  83                 if (keyMod & KMOD_SHIFT)
  84                 {
  85                         if (key >= SDLK_a && key <= SDLK_z)
  86                                 chr &= 0xDF;                                    // Set to upper case
  87                 }
  88
  89                 text.insert(scrollPos + caretPos, 1, chr);
  90
  91                 // If we hit the edge, then scroll; else advance the caret
  92                 if ((GetFontWidth() * caretPos) > (extents.w - GetFontWidth()))
  93                         scrollPos++;
  94                 else
  95                         caretPos++;
  96         }
  97         else if (key == SDLK_BACKSPACE)
  98         {
  99                 // If there's something to delete, go ahead and delete it
 100                 if ((scrollPos + caretPos) > 0)
 101                 {
 102                         text.erase(scrollPos + caretPos - 1, 1);
 103
 104                         // Scroll the cursor to the left if possible, otherwise move the scroll position
 105                         if (caretPos > 0)
 106                                 caretPos--;
 107                         else
 108                                 scrollPos--;
 109                 }
 110         }
 111         else if (key == SDLK_DELETE)
 112         {
 113                 if ((scrollPos + caretPos) < text.length())
 114                         text.erase(scrollPos + caretPos, 1);
 115         }
 116         else if (key == SDLK_LEFT)
 117         {
 118                 if (caretPos > 0)
 119                         caretPos--;
 120                 else if (scrollPos > 0)
 121                         scrollPos--;
 122         }
 123         else if (key == SDLK_RIGHT)
 124         {
 125                 if ((scrollPos + caretPos) < text.length())
 126                 {
 127                         if ((GetFontWidth() * caretPos) > (extents.w - GetFontWidth()))
 128                                 scrollPos++;
 129                         else
 130                                 caretPos++;
 131                 }
 132         }
 133         else if (key == SDLK_RETURN)
 134         {
 135                 clicked = activated = false;
 136         }
 137
 138         CheckStateAndRedrawIfNeeded();
 139 #endif
 140 }
 141
 142 void TextEdit::HandleMouseMove(uint32_t x, uint32_t y)
 143 {
 144         SaveStateVariables();
 145         inside = Inside(x, y);
 146         CheckStateAndRedrawIfNeeded();
 147 }
 148
 149 void TextEdit::HandleMouseButton(uint32_t x, uint32_t y, bool mouseDown)
 150 {
 151         SaveStateVariables();
 152
 153 //Not sure that this is right way to handle this...
 154 //Should set the cursor position based on where in the text box it was clicked...
 155         if (inside)
 156         {
 157                 if (mouseDown)
 158                         clicked = true;
 159
 160                 if (clicked && !mouseDown)
 161                 {
 162                         clicked = false, activated = true;
 163
 164                         // Send a message to our parent widget (if any) that we're activated
 165                         if (parent)
 166                                 parent->Notify(this);
 167                 }
 168         }
 169         else
 170                 clicked = activated = false;
 171
 172         CheckStateAndRedrawIfNeeded();
 173 }
 174
 175 void TextEdit::Draw(void)
 176 {
 177         if (img == NULL)
 178                 return;                                                                 // Bail out if no surface was created...
 179
 180         SDL_Rect rect = GetScreenCoords();
 181
 182         // Now, draw the appropriate text state!
 183
 184         if (!activated)
 185         {
 186                 if (inside)
 187                 {
 188                         SDL_Rect rect2;
 189                         rect2.x = 1;
 190                         rect2.y = 1;
 191                         rect2.w = extents.w - 2;
 192                         rect2.h = extents.h - 2;
 193
 194                         SDL_FillRect(img, NULL, hiliteColor);
 195                         SDL_FillRect(img, &rect2, bgColor);
 196                 }
 197                 else
 198                         SDL_FillRect(img, NULL, bgColor);
 199         }
 200         else
 201                 SDL_FillRect(img, NULL, bgColor);//Make a different color here, so we're clear we're editing...
 202
 203 //Should also draw different text color depending on whether or not we're activated...
 204         if (activated)
 205                 DrawStringTrans(img, 0, 0, fgColor, text.c_str() + scrollPos);
 206         else
 207                 DrawStringTrans(img, 0, 0, fgColor, text.c_str());
 208
 209         // Draw the cursor, if any
 210
 211         if (activated)
 212         {
 213                 SDL_Rect rectCursor;
 214                 rectCursor.x = caretPos * GetFontWidth();
 215                 rectCursor.y = 0;
 216                 rectCursor.w = 2;
 217                 rectCursor.h = GetFontHeight();
 218
 219                 SDL_FillRect(img, &rectCursor, cursorColor);
 220         }
 221
 222         SDL_BlitSurface(img, NULL, screen, &rect);      // This handles alpha blending too! :-D
 223
 224         needToRefreshScreen = true;
 225 }
 226
 227 void TextEdit::Notify(Element *)
 228 {
 229 }
 230
 231 std::string TextEdit::GetText(void)
 232 {
 233         return text;
 234 }
 235
 236 void TextEdit::SaveStateVariables(void)
 237 {
 238         activatedSave = activated;
 239         clickedSave = clicked;
 240         insideSave = inside;
 241         caretPosSave = caretPos;
 242         scrollPosSave = scrollPos;
 243         lengthSave = text.length();
 244 }
 245
 246 void TextEdit::CheckStateAndRedrawIfNeeded(void)
 247 {
 248         // Check to see if any of our state variables changed since we last saved them...
 249         if (activated != activatedSave || clicked != clickedSave || inside != insideSave
 250                 || caretPos != caretPosSave || scrollPos != scrollPosSave
 251                 || text.length() != lengthSave)
 252                 Draw();
 253 }